Drill-rod connection.



Ptemed oct/14,1913.

as suitably secured on its upper end the cable l5). A crosspiece is eecurcd in p0- Sition at the lower end ot the rods 3l by means of nutsl 3?, and through the crosslow stem thereon, a crosspiece arranged in the upper part ot the stem, and a cable connection, including a swivel, between the crosspiece and the boring device, substanpiece passes freely the rod 33 having l tially as set forth.

at, the upper end thereof the head 34 normally disposed at a distance above the crosspiece 32 and having its lower end passing into and suitably secured to the boring dcvice S. The swivel 2S is also 1 )ret'ei'al'ily iliade expansible and may consist of bolt 3S which has the upper end thereof suitably secured lo cable 19 and has on its lower end the head 3S and passes freely downwardly through the crosspiece 39 at the top of spaced p arallel rods 40 which rest on the top of one of the pins l2 and have on the l lower end portion theieot a erosspicce f1.1 to

which the cable l5) is suitably secured.

From the foregoing description and by referring to the drawings it will be understood that should the hollow stein E) break in use, the apparatus may be easily and quickly rai ed out ot the ground fl-. and llumeans lli `permits ot expeditious recovery of the parl ot the apparatus below the break.

While one form of construction embodying,r the invention has been particularly illustrated and described, there are many ehi Ares and moditicaticns thereof that ,will readily occur to those skilled in the art, wherefore the righty is reserved to all such lchanges and modifications as do not depart from the spirit and scope of the invention as deined in the appended claims.

l claim:

v1. The combination of rotary-drill apparatus including,r a boring device and a hol- `l`he combination of rotary-drill apparatus including a boring device aud a hollow stem thereon, a crosspiece arranged in the upper part et' the hollow stem, a cable connection, including a` swivel, between the cross-:piece and the borincr device, and means below the crosspiecc to assist in sustaining the weight of the cable, substantially as described.

3. The combi nation of a rotarydrill apparains including a boring device and a hollow stem thereon, a crosspiece arranged in the upper part of the hollow stein, a cable connected to the erosspiece, hooks and eyes fer joining sections of the cable, and an expansible swivel connection between the cable and the boring device.

4. The combination of a rotary-drill apparatus including a boring device and a hol low siem thereon, a crosspiece in thc hollow stem, a cable connected to the crosspiece, and an expansible swivel connection between the cable and the boring device, substantially as set forth.

ln testimony whereof, 1 have signed my naine to this specification in the presence ot two subscribing witnesses at Los Angeles, county of Los Anffeles, State of California, this 23rd day of .November A. D. 1912.

JOHN D. BOUGH NER.

Witnesses ANNA B. DiissAU, A. ll. LIDnERs. 

